Valve mechanism.



Patented Apr. 6, 1909.

4 SHEETS-SHEET 1.

IIH III WITNESSES: 9 My E. V. ANDERSON.

VALVE MECHANISM.

APPLIOATION FILED 00122, 1908.

' 917,740. Patented Apr. 6, 1909. 4 SHEETSSHEET 2.

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VALVE MECHANISM.

APPLIUATION FILED OCT. 22, 1908. 91 7,740. Patented Apr. 6, 1909.

4 SHEETSSHEET 3.

WITNESSES: INVENTOR gggw VIQMLWM i I 1 Awai Him,

Aitys E. V. ANDERSON. VALVE MECHANISM.

APPLICATION FILED 00w. 22, 1908.

Patented Apr; 6,1909.

4 SHBETSSHEET 4.

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UNITED STATES PATENT onmcn.

EDWARD V. ANDERSON, OF MONESSEN, PENNSYLVANIA, ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, TO GOLDEN-ANDERSON VALVE SPECIALTY OOMPANY,OFPITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

vALvn MECHANISM.

Specification of Letters Patent.

Application filed October 22, 1908. Serial No. 459,045.

Patented April 6, 1909.

provements in Valve Mechanism, of which lmprovement the followin is aspecification.

The invention described herein relates to improvements in valvemechanism for con,- trolling the height of water in tanks, reservoirs,etc. and has for its object a construction whereby when the water in thetank, etc., has reached a predetermined height the flow is cut off bythe weight of the fluid column .in the tank, but will be restored assoon assuch fluid column has decreased to a certain extent.

It is a further object of the invention to provide for means to preventthe flow of water to the tank regardless of the level of the watertherein, such cutting off of the flow being eflected by manuallycontrolled means or automatically on an increase of pressure in thesupply pipes.

The invention 18 hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification Figure1 is a sectional elevation of my improved valve mechanism; Fig. 2 is asectional view of the ripper portion of the valve mechanism shown in 1g.1, and Fig. 3 is a sectional detail View of the auxiliary valvescontrolling the main valve; Fig. 4 is a view similar to Fig. 3Illustrating a modified form of the controlling valves; Fig.5 is a viewsimilar to Fig. 1 showing an automatic arrangement for cutting off theflow to the tank, and Fig. 6.

is a detail view showing an electrically controlled means for closingthe main valve in the su ply pipe.

In e practice of my invention, the casmg 1 is provided with a diaphragm2having" an opening therethrough for the flow of water to the tank. Thiscasing is so connected to the supply pipe and tank that the pressure ofthe water flowing to the tank will force from its seat a valve 3controlling the opening in the dia hragm. This valve is made in the form0 a iston, the upper portion thereof fitting wit in a cylinder 4 iavingits axis comcident; with the axis of the opening through the diaphragm.,The

i the stem of valve 13 w for the baror lever 14. But when the rod 20cylinder is made of a diameter greater than the diameter of the openingthrough the diaphragm, and the piston is provided with an outwardlyextending flange 5 fittingsfrom the passage 7 to the passageS iscontrolled by a valve 10 seating in thedirection of the flow of thewater in the passage 7, and also preferably held to its seat by a spring11. The passage 9 is also connected to an exhaust passage 12. Theconnection between the passages 9 and 12 is controlled by a valve 13,which seats against the pres sure of the water in the cylinder so that'when free to move it may be forced open bysuch pressure.

The valves 10 and 13 are constantly subjected to the pressure of thefluid column in the tank or reservoir, such pressure tending to, forcethe valve 10 from its seat and to close the valve 13. This ressure ispreferably exerted through ;a iaphragm 15 arranged in the case or shell16, having the portion above the diaphragm connected b a pipe 17 to thelower portion of the tan or reservoir. The pressure of the fluid columnis counterbalanced to a certain extent by a spring 18 bearing at one endagainst the underside of the dia hragm and its 0 posite end on theadjustable head 19. The diaphragm o crates on the valves through a rod20 secured to the diaphragm and bearing at its lower end on a cross bar14 bearing on the rod is forced down byfipressure in the tank,

operate as a fulcrum will again sh is moved by the spring 18 its lowerend will act as a fulcrum, and the valve 13 will be held closed untilvalve 10 is closed, otherwise it might happen that both valves would beopen simultaneously and remain in such position.

When the water in the tank or reservoir reaches a predetermined height,the pressure of the fluid column exerted on the diaphragm will besufficient to force the valves 10 and 13 downwardly thereby .closing theexhaust valve 13 and o ening the inlet valve 10. Water will then ow bythe passages 7, 8 and 9 into the cylinder 4 and .thereby force thepiston valve 3 to its seat, closing the opening through the diaphragm.2. As'soon as the height of the fluid column in the tank or reservoiris reduced toa predetermined point, determined by the adjustment of theread 19 the spring 18 will force the diaphragm up, thereby permittingthe valve 10 to be closed by its spring 11 and the pressure of waterinpassage 7 and the valve 13 to be opened by the pressure of fluid in thecylinder. As the water escapes from the cylinder 4 the pressure on theunderside of the piston va ve 3 will force the latter from its seat, andwater will flow into the tank or reservoir. In its upward movement thepiston valve draws in air between the flange and lower head through theport 21 so as to provide an air cushion when the iston valve is againreturned to its seat y the pressure of water in the cylinder 4. As soonas the water attains the desired height in the tank or reservoir, theressure on the diaphragm 15 the valves 10 and 13, opening the former andclosing the latter, so that water will flow into the cylinder 4 andforce the piston valve to its seat.

As shown in Fig. 4 the valves 10 and 13 controlling the flow to and fromthe cylinder 4 may be balanced. This is effected in the case of valve 10by extending the cage cyl- -1nder 22 containing thes ring 11, and con--necting a piston 23. to t e valve 10, said piston operating in theportion of the cage elow the inlet ports 24-. In the case ofthe valve13, a shell or cylinder 25 is arranged in the passage 9 for thereception of a piston 26 connected to the valve 13, while the pistons 23and 26 are provided with suitable acking, water may esca e into thelower en s of the cylinders 22 an 25, and hence provision is made forthe escape of such water through passages 27. 1 A v as regards thenormal pressure on the inlet side of the valve 1 that the pressure of apredetermined water column in the tank wlll hold the valve 13 to itsseat as agalnst the pressure exerted by the water in the supply i eagainst the underside of the valve 3. EV en however the pressure on theinlet side of the valve 1' is materially increased, the unhlS apparatusWhen'in use is so adjusted seating pressure exerted on the valve 3 willforce the valve 13 0 en and allow the water to escape and the va ve 3 toopen. In order to revent an overflow of the tank due to sue increase ofpressure on the sup' ly side of the valve 3, provision is made as s iownin Fig. 5 for preventing the opening of the valve 3 on such increase ofpressure. In this construction a shell 28 is supported on top of theshell 15 and within this shell is arranged a diaphragm 29 carrying avalve 30 adapted to control a port 31 leading from the underside of thediaphragm 29 to the chamber in casing 16 above diaphragm 15. The valve30 is held to its seat by means of a spring 32 whose tension can beregulated by an adjustable pipe 34. to the inlet side of the main valve1.

The spring 32 is adjusted, to such tension by the sleeve 33 that undernormal pressures on the inlet side of the main valve 3 the spring willhold the valve 30 to its seat closing the port 31, but in case of amaterial increase of pressure in the supply pipe the diaphragm 29 willbe raised unseat-ing the valve 30 and permitting such increased pressureto operate on the diaphragm 15 in addition to the pressure due to thewater column in the tank operating through the ipe 17. It will bereadily understood that t 1e pressure exerted through the pipe 34 on thediaphragm 15 controlling the valve 13 will always be proportional to theunseating pressure exerted on the valve ,3, and will hold such valve toits seat.

In lieu of the automatic arrangement shown in Fig. 5 provision may bemade for causing an increased pressure in the supply pipe to operatedirectly upon the diaphragm 15. In this construction a valve 35 isarranged controlling the-flow from the pipe 34 into the chamber abovethe diaphragm 15. This valve is constructed to seat with the pressure inthe pipe 34 and is also preferably pushed toward its seat by a spring36. The stem of this valve is connected to or operated on by anelectro-magnet 37 preferably of the solenoid type, such electro-magnetbeing includedin the circuit leading to the pumping house and controlledby a switch therein. ii hen an increased pressure is desired inthesupply pipes as in the case of fire, the engineer in charge ot thepumping station will close the circuit, thereby opening the valve 35, sothat when an increased pressure is produced in the supply pipe suchpressure will operate on top of the diaphragm 15 and hold the valve 10to its seat as against any pressure exerted on-the valve 3 to unseat thelatter.

I claim herein as my invention:

1. A valve mechanism having in combination a casing or shell providedwith a transverse diaphragm havmg an opening therethrough, acyhnderintegral with the casing valve.

SUP

and having its axis coincident with the center of the opening in thediaphragm, a piston valve arranged in the cylinder and adapted to closethe opening through the diaphragm, the cylinder being connected to theinlet side of the casing, a spring seated valve contolling suchconnection, a valve controlling the exhaust from the cylinder andseating against pressure in the cylinder, and a diaphragm subjected tofluid pressure and adapted to simultaneously shift both valves to openand closed positions respectively.

2. A valve mechanism having in combination a main valve controlling theflow of fluid, a cylinder and piston for seating such valve, thecylinder being connected to the su plyside of the main valve andhaving-an ex aust port, valves controlling the inlet and exhaustpassages of the cylinder, a spring for seating one valve and meansoperated by said valve for seating the other controlling 3. A valvemechanism having in combination a main, valve controlling the flow offluid, a cylinder and piston for seating such valve, the cylinder beingconnected to the su ply side of the main valve and having an ex austport, valves controlling the inlet and exhaust passages of the cylinderone of said valves being movable to closed position by dply pressure,and means operative by sai valve for seating the other controllingvalve, and means controlled by fluid pressure on the delivery side ofthe for controlling both valves.

4. A valve mechanism having in combination a main valve controlling thefloW of fluid, a cylinder'and piston for seating said valve, thecylinder being connected to the supply side of the main valve and havingan ex aust passage, valves controlling the inlet and exhaust passages,means operative by fluid pressure on the delivery side for controllingsaid valves, and means operative by fluid pressure on the su ply side ofthe main valve for holding the ex aust valve in closed position.

5. A. valve mechanism having in combination a main valve controlling theflow of fluid, a cylinder and piston for seating said main valve valve,the cylinder being connected to the V su ply side of the main valve-andhaving an exhaust passage, valves controll ng the inlet and exhaustpassages, means operative fluid pressure on the delivery side of themain valve for controlling said valves, and means operative on anincrease above a predetermined point of fluid pressure on the supplyside of the main valve for holding the exhaust valve closed and theinlet valve open.

In testimony whereof, I have hereunto set my hand. ,p EDWARD V.ANDERSON.

Witnesses:

CHARLES BARNETT,

J. HERBERT BRADLEY.

